[Libre-soc-isa] [Bug 794] SVP64 REMAP for utf8

bugzilla-daemon at libre-soc.org bugzilla-daemon at libre-soc.org
Wed Mar 30 15:27:01 BST 2022


--- Comment #3 from Luke Kenneth Casson Leighton <lkcl at lkcl.net> ---
ironically whilst everyone else is desperately trying to smash
their heads against a SIMD wall we need to track down simple
scalar versions of algorithms because the insistence "But SIMD
Makes It Fast" makes it astoundingly difficult to comprehend.

it took 3 weeks for example to track down easy-to-read DCT
source code.

assessing this one therefore needs a similar (the usual) strategy:

1) work out the hotspots (good to hear UTF8 to UTF16 is common
   for example)
2) find *readable* non-assembler non-optimised non-parallelised
   reference implementations.

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